Anonymity Research
Welcome to the Anonymity Research Webpage!
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We design and analyze efficient, provably secure cryptographic solutions for anonymity networks (e.g., Tor) and privacy in the emerging scenarios (e.g., online advertising) over the Internet. Recently, we are also pursuing topics such as finding lower-bounds on communication anonymity, and bootstrapping censorship-evasive communication.
Publications
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Anonymity Trilemma: Strong Anonymity, Low Bandwidth Overhead, Low Latency — Choose Two.
Debajyoti Das, Sebastian Meiser, Esfandiar Mohammadi and Aniket Kate.
To appear at IEEE S&P (Oakland) ’17.
[PDF]
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Projects
The IoV research team has several projects underway to facilitate moving money worldwide with the same security, privacy and reliability guarantees as information does today. For that, we currently focus on three main aspects of the broad spectrum of Internet of Value, but we are eager to explore the many other dimensions of it.
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Bitcoin Mixing. Several research works have shown that the supposed
privacy provided by pseudonyms in Bitcoin is vulnerable to several attacks. In the view of this state of affairs, coin mixing, that is mixing your coins with other Bitcoin users, allows to perform anonymous transactions in a fully compatible manner
with current Bitcoin system. We have developed mixing protocols that help you to securely mix your coins with other users in the Bitcoin system. Additionally, we have extended this concept to provide the first path mixing protocol that allows anonymous transactions in credit networks. -
Privacy in Credit Networks. Credit networks such as Ripple allows to perform
not only same-currency but also inter-currency transactions worldwide in a matter of seconds, therefore overcoming the challenges with traditional banking systems. Nevertheless, credit networks have not received much attention from the research community yet. We fill this gap by providing a thorough privacy study and contributing solutions to enable privacy-preserving transactions in credit networks. -
Smart Contracts. The enforcement of current contracts between two parties require costly and time consuming procedures (e.g., going into court). Bitcoin smart contracts leverages the current Bitcoin system to create smart contracts, which enable the enforcement of
a contract established between to parties using the Bitcoin network as an arbitrator, therefore
reducing costs and time with traditional contract enforcement mechanisms. In our research we contribute
smart contracts for several applications such as non-equivocation contracts and non-disclosure agreements.
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Theory of Anonymity
— Anonymity TrilemmaStrong Anonymity, Low Bandwidth Overhead, Low Latency — Choose Two.
This work investigates the fundamental constraints of anonymous communication (AC) protocols.
We further study anonymity against a stronger global passive adversary that can additionally passively compromise some of the AC protocol nodes. For more information, follow the project webpage. |
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